Typewriting machine



Sept. 21 1926.

J. LINDBURG TYPEWRITING MACHI Filed March 21, 1924 l 5 I3 22 /o /7 J 0 22 [4 23 I I F? H [Z y ELL; ail Q i "ll 4 PATIENT OFFICE.-

Josiila LInDitiR', 'n noQ t Y :iIE W. YORK, Lemme 1 UNDERWooD TYPE- WRITER-.QOMPANYLQF 'IEEWYVX'IQRK; N. x, AcoRPoe'A'rIoN -01 DELAWARE.

TYPEWRiTINQMACHINE. I

E Z Thjis invention elatesito' ilnprovements'in card-holdingvharsffo J n pe l i i g machi es orholdlng the leadingetlgefbt' a'cardtofthejplateh. V

Onef of thez obj ects of the 'filivention is to i'mpro'ye and "simplify means for" attaching and locking the'card-holdiiig bar to platens 'o fufsualconstruction; and ior unlocking the same by asiinplemotion of. the hand.

Another featurejisjth'e provision of means for lifting 'the" card-hold ing bar f rom the surface" offthe' plat'en by the mot on "of unlockingjit,"for onveniently remov ng the "baiflfroin thefPlaten;

in the accompanyln drawings Figure 1 is a front e evation of the platen,

shouting the .cardhold-ingjbar in. front of theplatenJ {Figure :2 is an end viewlooking froin left I to right in Figure 1, showing the attachlug uneans as locked in. position;

1' 18, to I- receive the Figure 3 is'a similar end View, showing the platen afteriitfhas been revolved into f. a' 'positio'n having'i the; card-holding bar at 'the top thereof with the attaching means unlocked and "the bar lifted from the surface of the'platen.

machine, which is {mounted on the shaft 12 thereof by'means of end disks 13, Which are secured to the platen. v Ihe'disks 13 have thereon the usual hubs lat to fitthe shaft. T 1 2 to which said hubs may be'secured' in suitable manner.

atlthe periphery thereoftVith ,pin-shaped teeth 15 to fitcircular apertures 16 in the "the endslthereoffj v p I The cardholding-bar '17 is shown in Figures 2 and3as curved transversely, there of t'o fit'the 'surface of the platen '11," and: :lhe 'fi 'ont edge of saidbar 17 is shown in "Eigures lf and '2 {as having therein a groove leading edge I of a card onthejplatenll ;i v The' 'fends of said bar -17 eXtend beyond thedisks lifi an'dfter ninate in the sides 19, which extend at right angles to the-main w, dt e f'fihe et 7 ciewer eh en O iApmi'cfibfi fir d March 21';1924. serial no; 700,809.

the platen. The [sides 19 of said bar 17 I have therein the slots '20 'to straddle the hubs 14 of said di slzs"'l3, which hubs ,14'. are 'thereby' made tof cooperate with said teeth15 to keep the bar 17 --in po siti'on on the surface of the platenfll.

To prevent the sides 1,9]of the bar 17 from,

being displaced outwardlyin a radiaLdirectiojn" with relation to the? platen 11,' there-" by lifting the bar 17 therefrom, locking arms a or latches-21 areiproyided which are pivotally" connected at'22 to the sides 19015 the v bar l'jT, each at a point near, the periphery H l l of the platen 11. Saidiiatches 21 terminate Other features and advantagesfw ill here- H 'inat'ter appear." l

jhoe mbrace to hubs 14 F011 the side thereof reinoteflfroin' and at points thereoii substantially}opposite to .the main scr d-Til w To prevent'faccidentah displacement of said: latches 21, springs 24Vare provided, lnch are shown es eonnectedeach" at one end tl'iereof to alpin 2 5 on'said'latches; and at' the ot'her en'd' to a pin 261cm said sides 19.

flo lifft the bar .17 'froin the surface of the; platen ll preliminary to removing the bar therefrom, cams .27 are provided.- on ex- 77 p t'ensions'28 of saidlatches 21iji1ear the inll jdesignates the platen on typewriting' 'ner e' nds of s'aid'h'ooks "By turning said Qlatcheg Ql ontheirpi'vots 22 in a clockwise direction, in' Figure 2',' the 02111153 27, are broughtinto engagementwith the periphery of the hubs 14, thereby causing 'the pivots 122*to move the ban 171011 'sai d ute'eth 15 in V V r V V r a radial directienivith relation tothe platen, Each of said disks 13 is; also provided" thereby "disengaging the bar '17 from said teeth, and a continued-motion of said cams 2.? hits the bar 17' to aposition' such as main-body of the card-holding bar 17 near shown in Figure 3, When it may conve11- essary. 1

The teeth 15, fto fit th'e'aperturesijle'pare provided all around the periphery of .the

end disks 1-3, whereby the bar 17 my be 'eo 'i'veniently attached; to any part of the platen and l'0ckedin to"positionthereon by said latches 21,as' hereinbefore described.

To limit the outward] swinging 'otthe latches 21 on theiia piVOts QQ -When removing'fthe barhl'? from the platenll, stops provided Ont-Said latches 21fto he -main body of said bar, and means for reof, interchangeably to engage said teeth, the

end of said bar terminating in a side extending substantially at right-angles to the movably engaging said side with a part of the "platen substantially in line with the tooth in said aperture, thereby detachably connecting said bar to the platen.

2. The combination of a platen of a type writing machine, an "end disk secured'to the platen, radially-disposed pin-shaped teeth on 'the periphery of said disk, a card-holdin bar, an aperture in the main body thereof, interchangeably to engage said teeth, the end of said bar terminating in a side extending substantially at right angles to the main body of said bar, a slot in said side, radiallydisposed with relation to said disk and platen, and a cylindrical port-ion extending coaxially with said vdisk and platen, to fit said slot, thereby co-operating with the tooth in said aperture to detachablyconnect said bar to the platen.

3. In a typewriting machine, the combination with a revoluble platen, of a card-holding bar extending along the platen, said bar having its ends directed inwardly toward the platen-shaft, adjacent the ends of the platen and terminating in forks for engagement around said platen-shaft, and releasable members carried by said ends of the bar including hooks for engaging around said platen-shaft between the tines of the forks, whereby the bar is secured to the platen.

4. The combination of a platen of a type writing machine, a card-holding bar terminating at-its end in a side extendlng substantially at right angles to the main body thereof, a slot in said side radially disposed with relation to said platen, a cylindrical portion extending coaxially with said platen to fit said slot, means for co-operating with said portion in said slot to detachably connectsaid bar to the platen, and a cam pivotally connected to said side to react on said portion, thereby displacing said side radially with relation to'said platen, and thereby lifting the main body of said bar fromthe surface of the platen;

-' 5. The combination of a platen of a typewriting machine, a card-holding bar terminating at its end in a side extending subtantially at right angles to the main body said portion in said slot to detachably con- "and formed with forks for engagement around said platen-shaft, and releasable thereof, a slot in said side radially disposed with relation to said platen, a cylindrlcal portion extending coaxially with said platen to fit said slot, means for co-operating with nect said bar to the platen, a latch to prevent accidental displacement of said side in a radial direction with relation to said platen, pivotally connected to said side, and a cam on said latch to react on said portion when opening said latch, thereby displacing said latch radially with relation to said platen, and thereby lifting the main'body'of said bar from the surface of the platen;

6. In a typewriting machine, ,the combina tion with a revoluble platen, of a card-holding bar extending therealong, the ends of the bar being turned inwardly toward the platen-shaft, adjacent the ends of the platen hooks pivoted to said ends of the bar for engagement around the platen-shaft between V the tines of the forks, whereby to secure the bar to the platen-shaft, said hooks each ineluding a cam co-acting against the platen-' shaft during the act of releasing the'bar from the platen, whereby the cams raise the bar from the platen.

7. The combination of a platen of a-typewriting machine, a pair of end disks'secured to the platen, hubson said disks at the center thereof, pin-shaped teeth on the periphcry of each of said disks, a card-holding bar to fit the surface of the platen, a'pair of apertures in the main body of said bar,'interchangeably to engage said teeth, the ends of said bar terminating in sides extending substantially at right angles to the main body thereof, and slots in said sides radially dis- I posed with relation to said disks and said platen, to fit said hubs, thereby co-operating with said teeth in said apertures to detachably connect said bar to the platen.

8. In a typewriting machine, the combination with a revoluble platen, of a card-holding bar extending along the platen, the ends of said bar being turned inwardly toward the platen-shaft, adjacent the ends of the platen, and releasable means for securing i said ends to the platen-shaft, said means in cluding a cam engageable with said platenshaft, whereby, upon actuating said securing means to release the bar, the cam is effective to raise the bar from the platen. 9. In a typewriting machine, the combination with a platen, of a card-holding bar extending along the platen and having'a per foration therein, a series of pins disposed around the platen and engageable selectively with said perforation for holding the platen against angular displacement, and releasable means for securing the bar to the platen in cluding a cam. engageable with the platen,

whereby, uponactuating said securing means to release the bar, the cam coacts against the angular displacement in any selected posiplaten to raise said bar from thepins. tion around the platen, and releasable means 10. In a typewriting machine, the combiforcecuring the bar to the platen, said means 10 nation with a platen, of a card-holding bar being effective to free the bar from said se- 5 extending along the platen, means disposed lectiv'e holding means during the act of rearound the platen and engageable selectively leasingthe bar from the platen. with the bar, whereby said bar is held against JOSEPH LINDBURG. 

